The Federal Government and the nation's two most populous states have splintered over COVID-19 and school closures.
NSW Premier Gladys Berejiklian says schools will remain open for those in need, but her government will encourage parents to keep their children at home wherever possible.
The social and economic repercussions of closing all schools are huge and have a flow-on effect as many parents are unable to work while their children are at home.
The increase is the state's largest daily total so far.
NSW Premier Gladys Berejiklian said health experts had advised her to encourage parents to keep their children away from schools. "We understand for some parents that is not possible", she said.
"Whether your child is working from home or school, it will be the same unit of learning", she said.
Ms Berejiklian said the new restrictions will likely save lives across the state.
Australia's two largest states have chose to take significant new steps to combat the COVID-19, with both states announcing that non-essential activities and businesses will be shut down from midday Monday.
The premier admitted that up to 30 per cent of children were absent from NSW schools last week.
New South Wales has reported 149 new coronavirus cases in 24 hours, the highest one-day jump since the outbreak began.
Dr Chant confirmed there are 10 people in ICU and six confirmed coronavirus deaths in the state.
Victoria's schools will close from Tuesday, but NSW and Tasmanian schools would remain open. "Every Australian has been advised not to undertake non-essential travel", Mr Andrews said.
"Although the advice from both the Department of Health and the Association of Independent Schools NSW is to keep schools open, we have assessed the risk for our school context as too great to remain open any longer".
According to Dr Phelps and other medical professionals, Mumbualla School has acted in a timely way and it's past time state schools follow their lead.
The school holidays have been brought forward and teachers will conduct online learning lessons with students.
"I want to stress that, for parents that have no option, for parents that are workers and have no option, the school is safe for children to attend", she reiterated.